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Diffstat (limited to 'arch/riscv/include/asm/barebox-riscv.h')
| -rw-r--r-- | arch/riscv/include/asm/barebox-riscv.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/barebox-riscv.h b/arch/riscv/include/asm/barebox-riscv.h new file mode 100644 index 0000000000..980165dc8a --- /dev/null +++ b/arch/riscv/include/asm/barebox-riscv.h @@ -0,0 +1,104 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Alex Zuepke <azu@sysgo.de> + */ + +#ifndef _BAREBOX_RISCV_H_ +#define _BAREBOX_RISCV_H_ + +#include <linux/sizes.h> +#include <asm-generic/memory_layout.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/compiler.h> +#include <asm/sections.h> + +unsigned long get_runtime_offset(void); + +void setup_c(void); +void relocate_to_current_adr(void); +void relocate_to_adr(unsigned long target); +void __noreturn __naked barebox_riscv_entry(unsigned long membase, unsigned long memsize, + void *boarddata); + +unsigned long riscv_mem_ramoops_get(void); +unsigned long riscv_mem_endmem_get(void); + +void *barebox_riscv_boot_dtb(void); + +static inline unsigned long riscv_mem_stack_top(unsigned long membase, + unsigned long endmem) +{ + return endmem - SZ_2M; +} + +static inline unsigned long riscv_mem_stack(unsigned long membase, + unsigned long endmem) +{ + return riscv_mem_stack_top(membase, endmem) - STACK_SIZE; +} + +static inline unsigned long riscv_mem_early_malloc(unsigned long membase, + unsigned long endmem) +{ + return riscv_mem_stack(membase, endmem) - SZ_128K; +} + +static inline unsigned long riscv_mem_early_malloc_end(unsigned long membase, + unsigned long endmem) +{ + return riscv_mem_stack(membase, endmem); +} + +static inline unsigned long riscv_mem_ramoops(unsigned long membase, + unsigned long endmem) +{ + endmem = riscv_mem_stack(membase, endmem); +#ifdef CONFIG_FS_PSTORE_RAMOOPS + endmem -= CONFIG_FS_PSTORE_RAMOOPS_SIZE; + endmem = ALIGN_DOWN(endmem, SZ_4K); +#endif + + return endmem; +} + +static inline unsigned long riscv_mem_barebox_image(unsigned long membase, + unsigned long endmem, + unsigned long size) +{ + endmem = riscv_mem_ramoops(membase, endmem); + + return ALIGN_DOWN(endmem - size, SZ_1M); +} + +#define ENTRY_FUNCTION(name, arg0, arg1, arg2) \ + void name (ulong r0, ulong r1, ulong r2); \ + static void __##name(ulong, ulong, ulong); \ + void __naked __noreturn __section(.text_head_entry_##name) name \ + (ulong a0, ulong a1, ulong a2) \ + { \ + __barebox_riscv_head(); \ + __##name(a0, a1, a2); \ + } \ + static void __naked __noreturn noinline __##name \ + (ulong arg0, ulong arg1, ulong arg2) + + +/* + * When using compressed images in conjunction with relocatable images + * the PBL code must pick a suitable place where to uncompress the barebox + * image. For doing this the PBL code must know the size of the final + * image including the BSS segment. The BSS size is unknown to the PBL + * code, so define a maximum BSS size here. + */ +#define MAX_BSS_SIZE SZ_1M + +#define barebox_image_size (__image_end - __image_start) + +#endif /* _BAREBOX_RISCV_H_ */ |